H44H/Y升降止回阀

H44H铸钢止回阀 德标

H76H/7蝶阀旋启式止回阀 美标

H44H/Y铸钢旋启式止回阀

H41Y钢制止回阀

J61Y日标截止阀

J41H国标铸钢截止阀

J61Y国标电站截止阀

J61Y电站截止阀

J41H德标截止阀

WJ44H德标直角式波纹管截止阀

WZ41Y德标波纹管截止阀